I may be the only one who believes that Labour edged to its narrow four-seat majority in the 1964 general election because of the Beatles. For most of 1963, the prime minister to be, Harold Wilson, had been talking of a new Britain – on the move from the antiquated, public-school-dominated establishment represented by the aristocratic prime minister, Alec Douglas-Home, to a country characterised by youth, dynamism, mobility and innovation.